Study the diagram given below and answer the following question.How many educated people are employed ?
Correct answer: A. 9
- A. 9
- B. 18
- C. 20
- D. 15
Explanation
This is the correct count of educated people who are employed, derived from adding the two relevant segments in the diagram: 3 and 6.
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About Electromagnetic Induction
Changing magnetic flux induces an emf according to Faraday's law, while Lenz's law gives the direction that opposes the change producing it. Transformers apply induction between coils to step alternating voltage up or down, with turns ratio, current transformation and energy losses determining practical operation.
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